Rana el Kaliouby: This app knows how you feel — from the look on your face

This quick TED talk entry is courtesy of TED.com. Our emotions influence every aspect of our lives — how we learn, how we communicate, how we make decisions. Yet theyâ€™re absent from our digital lives; the devices and apps we interact with have no way of knowing how we feel. ScientistÂ Rana el KalioubyÂ aims to change that. She demos a powerful new technology that reads your facial expressions and matches them to corresponding emotions.Â ThisÂ â€œemotion engineâ€Â has big implications, she says, and could change not just how we interact with machines — but with each other.